Charles and Lizzie Peterson love puppies. Their family fosters these young dogs, giving them love and proper care, until they can find the perfect forever home. Lizzie's got some competition! At Caring Paws Animal Shelter to volunteer, she meets newcomer Harper. Like Lizzie, Harper loves and knows lots about dogs! But when Sparky, a tiny Chihuahua mix, arrives with an injured leg to the shelter, the two girls will have to team up to find this sweet and strong puppy a perfect home.